Search results for "difference"

Ex vivo measurement reliability using two different cbct scanners for orthodontic purposes

2012

Background There are many cone beam computed tomography (CBCT) scanners available on the market: detector technology, algorithm precision, and scanner settings influence image quality. The aim of this study was to compare the accuracy of linear measurements made on images of the same sample obtained using two different CBCT scanners. Methods Twenty-eight linear measurements between orthodontic anatomical landmarks that were marked with gutta-percha points on a fresh sacrificed lamb head were taken three times. The head was scanned with two CBCT scanners using different scanning parameters. Digital Imaging and Communications in Medicine (DICOM) images were reconstructed and the same measurem…

Highly Accurate Conservative Finite Difference Schemes and Adaptive Mesh Refinement Techniques for Hyperbolic Systems of Conservation Laws

2007

We review a conservative finite difference shock capturing scheme that has been used by our research team over the last years for the numerical simulations of complex flows [3, 6]. This scheme is based on Shu and Osher’s technique [9] for the design of highly accurate finite difference schemes obtained by flux reconstruction procedures (ENO, WENO) on Cartesian meshes and Donat-Marquina’s flux splitting [4]. We then motivate the need for mesh adaptivity to tackle realistic hydrodynamic simulations on two and three dimensions and describe some details of our Adaptive Mesh Refinement (AMR) ([2, 7]) implementation of the former finite difference scheme [1]. We finish the work with some numerica…

Scuola ed educazione nel pensiero di Jane Roland Martin

2017

The article presents Jane Roland Martin's philosophy of education in the light of the need to rethink the school according to more inclusive and gender-sentive ideals. From a pedagogical perspective, Roland Martin argues first and foremost that not one can opt for an educational ideal that claims to be free from sexual difference: this is equivalent to confirming an ideal designed for the male experience, but then proposed to both males and females as desirable goal to reach in school contexts. Roland Martin instead argues for the need to rethinking school contexts in more inclusive terms and, first of all, the ideal of "educated person". At the same time, however, this account highlights t…

Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations

2007

The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…

Kelimpahan Makrozoobentos di Daerah Bervegetasi (Lamun) dan Tidak Bervegetasi di Teluk Doreri Manokwari

2017

Makrozoobentos di daerah bervegetasi (lamun) memiliki kepadatan yang lebih tinggi yaitu berkisar antara 0,070-0,085 ind/2738,06 cm3, dibandingkan dengan pada daerah yang tidak bervegetasi yaitu berkisar antara 0,035-0,067 ind/2738,06 cm3. Angka ini juga dibuktikan dengan uji t yang menunjukkan H1 diterima yang berarti ada perbedaan yang nyata antara kepadatan makrozoobentos yang ditemukan di daerah bervegetasi dan daerah tidak bervegetasi. Jumlah spesies yang ditemukan di daearah bervegetasi dengan alat corer di Teluk Doreri adalah 113 spesies dan di daerah tidak bervegetasi ditemukan 57 spesies.

Soil Water Content Diachronic Mapping: An FFT Frequency Analysis of a Temperature–Vegetation Index

2020

Among the indirect estimation approaches of soil water content in the upper layer of the soil, the &ldquo

Absentismo escolar en España. Datos y reflexiones

2020

El absentismo escolar no recibe en España la atención que merece. Pese a que diversos estudios señalan que la ausencia de las aulas del alumnado en edad de escolarización obligatoria es más amplia de lo que parece ‒los informes PISA, por ejemplo, lo cuantifican entre el 25 y el 28 % del alumnado de 4º de la secundaria obligatoria‒ esta realidad presenta una escasa visibilidad educativa y social. En el trabajo se realiza una primera clarificación conceptual del problema, para posteriormente analizar con un enfoque integral la normativa legal que articula en nuestro país: el derecho a la educación; la escolarización obligatoria y el absentismo. A partir de ese marco teórico, se señalan los tr…

Gender Differences In Stem Courses: Analysis Of Italian Students' Performance

2021

Gender gap in Science, Technology, Engineering and Mathematics (STEM) courses is a prevalent topic in the recent literature, and quantitative studies on this relationship are essential to understand better the discussion and issues claimed by the arguments and the theories on this topic. In Italy, since 1989, the overall share of females enrolling at university is larger than the males' one, but females are still underrepresented in almost all the STEM fields, while overrepresented in nursing, humanities, and law schools. Our paper aims to investigate the gender differences in terms of university performance in STEM courses in Italy. This is done via segmented regression models, representin…

RIE : revista de investigación educativa

2011

The aim of this study was to examine the impact of the type of self-concept (academic and general) and extracurricular activities on academic performance among primary school students (N = 1708), and to determine the differences of this relationship in terms of gender. We used a cluster sampling stratified into two stages and gave standardized achievement tests and ad-hoc instrument designed for academic and general self-concept and extracurricular activities. The results showed that respondents who engaged in academic extracurricular activities such as language and computer performed better in all academic subjects. Those who took music and sports also scored better in some subjects. In co…

2018

Positive teacher attitudes are essential for success when children with special educational needs (SEN) are placed into mainstream classrooms. The present study surveyed teachers’ attitudes towards...